cumulative | R Documentation |
So far, two specials are implemented. concurrent
is used when
the goal is to estimate a concurrent effect of the TDC. cumulative
is used when the goal is to estimate a cumulative effect of the TDC. These
should usually not be called directly but rather as part of the formula
argument to as_ped
.
See the vignette on data transformation
for details.
cumulative(..., tz_var, ll_fun = function(t, tz) t >= tz, suffix = NULL)
concurrent(..., tz_var, lag = 0, suffix = NULL)
has_special(formula, special = "cumulative")
... |
For |
tz_var |
The name of the variable that stores information on the times at which the TDCs specified in this term where observed. |
ll_fun |
Function that specifies how the lag-lead matrix should be constructed. First argument is the follow up time second argument is the time of exposure. |
lag |
a single positive number giving the time lag between for
a concurrent effect to occur (i.e., the TDC at time of exposure |
formula |
A two sided formula with a |
special |
The name of the special whose existence in the
|
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